A beautiful phenomenom due to the difference between the water temperature and the density
(yeah, it's not water pollution, but a physical phenomenom)
(Rio Solimões x Rio Negro - Solimões River x Negro River // Amazônia, Brazil)

One beach from my state: Jericoacoara! (Ceará, Brazil) :D

The only exclusive biome in brazil: Caatinga, also known as the " white forest". My state, again ^~^ (its biological patrimony can be only found there)